53307782778305 has 16 divisors (see below), whose sum is σ = 70146312764544. Its totient is φ = 38568419374080.

The previous prime is 53307782778233. The next prime is 53307782778307. The reversal of 53307782778305 is 50387728770335.

It is not a de Polignac number, because 53307782778305 - 2¹² = 53307782774209 is a prime.

It is a super-2 number, since 2×53307782778305² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53307782778307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2510954189 + ... + 2510975418.

It is an arithmetic number, because the mean of its divisors is an integer number (4384144547784).

Almost surely, 2^{53307782778305} is an apocalyptic number.

53307782778305 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

53307782778305 is a deficient number, since it is larger than the sum of its proper divisors (16838529986239).

53307782778305 is a wasteful number, since it uses less digits than its factorization.

53307782778305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5021929816.

The product of its (nonzero) digits is 207446400, while the sum is 65.

The spelling of 53307782778305 in words is "fifty-three trillion, three hundred seven billion, seven hundred eighty-two million, seven hundred seventy-eight thousand, three hundred five".